Made in the Usa Axle lines These lines typically run from the axle hose out to each rear wheel that may be disc or drum. Axle lines are usually 2 piece and feed the rear brakes. They may go straight into the rear wheel cylinder or caliper or may have a rubber brake hose that connect the rear caliper to the metal hard line so when is time to change the pads the caliper can be removed with out having to disconnect and rebleed the brakes. In many cases axle lines have on them to protect the line from road debris. is added protection to the line. Jeeps and trucks always have the and cars typically dont. Brake Lines are the metal hydraulic lines that carry the fluid that stop the car. If one line is typically bad the rest will soon fail. If replacing lines, is best to do all of them. Brake Hose are not Lines this is confusing when talking about brake lines. The brake hose are the flexible connectors to the components the brake lines are the hard metal lines.